Accelerated MR thermometry mapping involving an image ratio constrained reconstruction
First Claim
1. A medical apparatus comprising:
- a magnetic resonance imaging system for acquiring magnetic resonance data;
a processor for controlling the medical apparatus; and
a memory containing machine readable instructions for execution by the processor, wherein execution of the instructions causes the processor to;
acquire a first set of magnetic resonance data;
reconstruct a first image using the first set of magnetic resonance data;
acquire an undersampled magnetic resonance data set, wherein the undersampled magnetic resonance data set is undersampled in k-space in comparison to the first set of magnetic resonance data;
reconstruct a second image using the undersampled magnetic resonance data set and the first image, wherein the second image is reconstructed using an image ratio constrained reconstruction algorithm; and
calculate a temperature map using the second image.
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Accused Products
Abstract
A medical apparatus (300, 400, 500, 600) includes a magnetic resonance imaging system (301). The medical apparatus further includes a memory (330) containing instructions (350, 352, 354, 456, 458, 460) for execution by a processor (324). Execution of the instructions causes the processor to acquire (102, 202) baseline magnetic resonance data (332) and reconstruct (104, 204) a first image (334) using the baseline magnetic resonance data. Execution of the instructions further causes the processor acquire (106, 212) undersampled magnetic resonance data (336), which is undersampled in k- space in comparison to the baseline magnetic resonance data. Execution of the instructions further causes the processor reconstruct (108, 214) a second image (338) using the undersampled magnetic resonance data and the first image. The second image is reconstructed using an image ratio constrained reconstruction algorithm (354). A temperature map (340) is calculated (110, 216) using the second image.
11 Citations
18 Claims
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1. A medical apparatus comprising:
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a magnetic resonance imaging system for acquiring magnetic resonance data; a processor for controlling the medical apparatus; and a memory containing machine readable instructions for execution by the processor, wherein execution of the instructions causes the processor to; acquire a first set of magnetic resonance data; reconstruct a first image using the first set of magnetic resonance data; acquire an undersampled magnetic resonance data set, wherein the undersampled magnetic resonance data set is undersampled in k-space in comparison to the first set of magnetic resonance data; reconstruct a second image using the undersampled magnetic resonance data set and the first image, wherein the second image is reconstructed using an image ratio constrained reconstruction algorithm; and calculate a temperature map using the second image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of operating a medical apparatus wherein the medical apparatus comprises a magnetic resonance imaging system for acquiring magnetic resonance data;
- wherein the method comprises the steps of;
acquiring first magnetic resonance data; reconstructing a first image using the first magnetic resonance data; acquiring undersampled magnetic resonance data, wherein the undersampled magnetic resonance data is undersampled in k-space in comparison to the first magnetic resonance data; reconstructing a second image using the undersampled magnetic resonance data and the first image, wherein the second image is reconstructed using an image ratio constrained reconstruction algorithm; and calculating a temperature map using the second image. - View Dependent Claims (15)
- wherein the method comprises the steps of;
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16. A non-transitory computer-readable medium carrying machine executable instructions for execution by a processor of a medical apparatus;
- wherein the medical apparatus comprises a magnetic resonance imaging system for acquiring magnetic resonance data;
wherein execution of the instructions causes the processor to;acquire a first magnetic resonance data set; reconstruct a first image using the first magnetic resonance data set; acquire an undersampled magnetic resonance data set, wherein the undersampled magnetic resonance data set is undersampled in k-space in comparison to the first magnetic resonance data set; reconstruct a second image using the undersampled magnetic resonance data set and the first image, wherein the second image is reconstructed using an image ratio constrained reconstruction algorithm; and calculate a temperature map using the second image.
- wherein the medical apparatus comprises a magnetic resonance imaging system for acquiring magnetic resonance data;
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17. A medical apparatus comprising:
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a magnetic resonance imaging system configured to acquire magnetic resonance data from a region of a subject including a target volume; a treatment device configured to deliver treatment to the target volume; one or more processors configured to; acquire a first set of magnetic resonance data from the magnetic resonance imaging system at a first time, reconstruct the first set of magnetic resonance data into a first image including the target volume, at a second time subsequent to the first time, acquire a second set of magnetic resonance data from the magnetic resonance imaging system, the second set of magnetic resonance data being undersampled in k-space relative to the first set of magnetic resonance data, reconstruct the second set of magnetic resonance data into a second image including the target volume using the first image and an image ratio constrained reconstruction algorithm, using the second image, calculate a temperature map indicative of temperature change in the target volume, and control delivery of treatment to the target volume by the treatment device in accordance with the temperature map. - View Dependent Claims (18)
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Specification